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Class Information
Number: 250/202
Name: Radiant energy > Photocells; circuits and apparatus > Photocell controls its own optical systems > Following a pattern (e.g., line or edge)
Description: Subject matter having means for illuminating the photocell in accordance with the relative position of the photocell and a pattern, and having means for causing the photocell to follow the edge of the pattern under control of said illumination, or for causing the optical path between pattern and photocell to change, under the control of said illumination, so that the photocell follows the edge of the pattern image.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7295292 |
Methods and systems for measuring an aberated wave front |
Nov. 13, 2007 |
| 6920249 |
Method and measuring instrument for determining the position of an edge of a pattern element on a substrate |
Jul. 19, 2005 |
| 6815702 |
Method and apparatus for detection of an edge of a printing plate mounted on a drum imaging system |
Nov. 9, 2004 |
| 6596987 |
Methods and systems for monitoring combustion condition |
Jul. 22, 2003 |
| 6591155 |
Methods and apparatus for calculating alignment of layers during semiconductor processing |
Jul. 8, 2003 |
| 6543972 |
Device to help determine key cut attributes |
Apr. 8, 2003 |
| 6338015 |
Steering control system for vehicle |
Jan. 8, 2002 |
| 6338013 |
Multifunctional mobile appliance |
Jan. 8, 2002 |
| 6220158 |
Rotation-angle measurement for printing presses |
Apr. 24, 2001 |
| 6065911 |
Method and apparatus for automatically making keys |
May. 23, 2000 |
| 5974347 |
Automated lawn mower |
Oct. 26, 1999 |
| 5908273 |
Key duplication apparatus and method |
Jun. 1, 1999 |
| 5869945 |
Infrared scanner |
Feb. 9, 1999 |
| 5864145 |
Optical tracing system for measuring elevation of a reference body above a reference surface |
Jan. 26, 1999 |
| 5807042 |
Method and apparatus for automatically making keys |
Sep. 15, 1998 |
| 5646723 |
Combined earth sensor |
Jul. 8, 1997 |
| 5373150 |
Line tracing method and apparatus therefor |
Dec. 13, 1994 |
| 5357096 |
Line tracing method and line tracing apparatus |
Oct. 18, 1994 |
| 5351309 |
Image edge sensor |
Sep. 27, 1994 |
| 5350912 |
System for controlling movement of a mobile body along a target path |
Sep. 27, 1994 |
| 5319186 |
Apparatus for controlling the movement of a tool along the edge of glass panes |
Jun. 7, 1994 |
| 5262797 |
Monitoring and controlling quality of pen markings on plotting media |
Nov. 16, 1993 |
| 5243265 |
Non-contact tracing control apparatus |
Sep. 7, 1993 |
| 5225827 |
Warning device in a motor vehicle for detection of unintentional change of course |
Jul. 6, 1993 |
| 5210399 |
Optical probe head with mounting means providing a free recalibration of the sensing head after a collision |
May. 11, 1993 |
| 5173598 |
Optical scanning beam position control system which is free of modulation by tracking error |
Dec. 22, 1992 |
| 5170047 |
Optical sensor for plotter pen verification |
Dec. 8, 1992 |
| 5144131 |
Device for optically scanning an information plane detecting border portions of light beam |
Sep. 1, 1992 |
| 5144130 |
Method for the electrical adjustment of an optical row of sensors |
Sep. 1, 1992 |
| 5130523 |
Coordinate measuring machine with improved flexure and clamp for fiber optic connection |
Jul. 14, 1992 |
| 5128531 |
Optical profile reader, particularly for key duplicating machine |
Jul. 7, 1992 |
| 5079543 |
Monitoring device for at least one current pickup of a conveyor truck in a conveyor system running on tracks |
Jan. 7, 1992 |
| 5066854 |
Method of and apparatus for guiding a self-steering vehicle along an optical guideway |
Nov. 19, 1991 |
| 5041722 |
Method of guiding movement of unmanned vehicle by following a number of luminous points |
Aug. 20, 1991 |
| 5013901 |
Tracking control method for eliminating a tracking error due to a movement of an objective lens |
May. 7, 1991 |
| 4988200 |
Apparatus for automatic tracking and contour measurement |
Jan. 29, 1991 |
| 4985847 |
Visual sensor system |
Jan. 15, 1991 |
| 4944826 |
Method and apparatus for preparing a screen printing screen |
Jul. 31, 1990 |
| 4937593 |
Print head position control system |
Jun. 26, 1990 |
| 4933541 |
Method and apparatus for active vision image enhancement with wavelength matching |
Jun. 12, 1990 |
| 4924455 |
Apparatus for generating tracking error signals in a differential phase detection system |
May. 8, 1990 |
| 4888478 |
Line tracer improved corner circuit with speed varying sampling |
Dec. 19, 1989 |
| 4884224 |
Method for generating image contour data and apparatus therefor |
Nov. 28, 1989 |
| 4872105 |
Curve following apparatus |
Oct. 3, 1989 |
| 4866687 |
Optical disc access method and optical disk storage using coarse and fine actuators |
Sep. 12, 1989 |
| 4864118 |
Optical scanning unit with tracking error detection |
Sep. 5, 1989 |
| 4855981 |
Method and device for reading out optically recorded data and compensating for a drastic change in the position of a line to be read |
Aug. 8, 1989 |
| 4811061 |
Polychromatic mutual alignment device for an aiming apparatus |
Mar. 7, 1989 |
| 4807211 |
Apparatus for inscribing and/or reading a record carrier |
Feb. 21, 1989 |
| 4805163 |
Tracking control unit in information reproducing apparatus |
Feb. 14, 1989 |
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